EP1396774A1 - Gas flow regulator with a flow limiter - Google Patents

Gas flow regulator with a flow limiter Download PDF

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Publication number
EP1396774A1
EP1396774A1 EP20030003148 EP03003148A EP1396774A1 EP 1396774 A1 EP1396774 A1 EP 1396774A1 EP 20030003148 EP20030003148 EP 20030003148 EP 03003148 A EP03003148 A EP 03003148A EP 1396774 A1 EP1396774 A1 EP 1396774A1
Authority
EP
European Patent Office
Prior art keywords
stage
flow
regulation
gas
limiter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20030003148
Other languages
German (de)
French (fr)
Other versions
EP1396774B1 (en
Inventor
Savio Cavagna
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cavagna Group SpA
Original Assignee
Cavagna Group SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cavagna Group SpA filed Critical Cavagna Group SpA
Publication of EP1396774A1 publication Critical patent/EP1396774A1/en
Application granted granted Critical
Publication of EP1396774B1 publication Critical patent/EP1396774B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
    • F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
    • F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/0402—Control of fluid pressure without auxiliary power with two or more controllers mounted in series
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/01—Control of flow without auxiliary power
    • G05D7/0106—Control of flow without auxiliary power the sensing element being a flexible member, e.g. bellows, diaphragm, capsule
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2605—Pressure responsive
    • Y10T137/2607—With pressure reducing inlet valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7793—With opening bias [e.g., pressure regulator]
    • Y10T137/7794—With relief valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7793—With opening bias [e.g., pressure regulator]
    • Y10T137/7795—Multi-stage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7793—With opening bias [e.g., pressure regulator]
    • Y10T137/7822—Reactor surface closes chamber
    • Y10T137/783—Reactor operatively connected to valve by mechanical movement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7869—Biased open

Definitions

  • the present invention relates to a device for regulating the flow of gas toward user equipment.
  • regulation devices In order to regulate the pressure of the flow of gas toward user equipment, regulation devices have long been used which generally have a first regulation stage, normally located outside the building, downstream of which a second regulation stage is placed.
  • the gas is sent, by means of a venting valve, toward a discharge port that is different from the outlet port for connection to the user equipment.
  • the aim of the invention is to solve the problem described above by providing a device for regulating the flow of gas toward user equipment, of the type with two regulation stages in succession, which in case of malfunction is capable of reducing significantly the amount of gas that is released, so as to achieve a considerable reduction of waste and an increase in safety.
  • an object of the invention is to provide a regulation device that allows to increase safety conditions considerably, without thereby having to resort to complicated apparatuses.
  • Another object of the present invention is to provide a regulation device that thanks to its particular constructive characteristics is capable of giving the greatest assurances of reliability and safety in use.
  • Another object of the present invention is to provide a device for regulating the flow of gas toward user equipment that can be obtained easily starting from commonly commercially available elements and materials and is further competitive from a merely economical standpoint.
  • a device for regulating the flow of gas toward user equipment comprising a first regulation stage and a second regulation stage arranged downstream in a direction of flow of the gas to be controlled, characterized in that it comprises a flow limiter interposed between said first and second regulation stages and adapted to intervene if said second stage malfunctions.
  • the device for regulating the flow of gas toward user equipment comprises a first regulation stage 2, which is arranged externally, and a second regulation stage, designated by the reference numeral 3.
  • first and second regulation stages are directly connected one another and arranged side by side; nothing changes conceptually if the first and second stages are physically spaced and connected by a connecting duct.
  • the particularity of the invention consists in that there is provided a flow limiter, generally designated by, the reference numeral 10, which is interposed between the first stage 2 and the second stage 3 and is designed to act when a malfunction occurs in the second stage.
  • the limiter 10 which is arranged at an outer casing 31 of the second stage, has a cylindrical bushing 11, which is accommodated hermetically in a seat 12 and forms an internal channel 13.
  • the ball overcomes the elastic contrast applied by the spring 17 and arranges itself in abutment against a frustum-shaped flared portion 19 formed at the axial end of the bushing.
  • the second stage 3 is provided internally with a conventional membrane 30, which is connected to the casing 31 and engages centrally a stem 32 that is affected by conventional setting springs 33.
  • the materials used, as well as the contingent shapes and dimensions may be any according to requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Safety Valves (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Flow Control (AREA)
  • Gas Burners (AREA)
  • Pipeline Systems (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

A device (1) for regulating a flow of gas toward user equipment, which comprises a first regulation stage (2) and a second regulation stage (3) arranged downstream in a direction of flow of the gas to be controlled, further comprising a flow limiter (10) interposed between the first (2) and second (3) regulation stages and adapted to intervene if the second stage (3) malfunctions.

Description

  • The present invention relates to a device for regulating the flow of gas toward user equipment.
  • As is known, in order to regulate the pressure of the flow of gas toward user equipment, regulation devices have long been used which generally have a first regulation stage, normally located outside the building, downstream of which a second regulation stage is placed.
  • With the current situation, in case of failure or malfunction of the second regulation stage, the gas is sent, by means of a venting valve, toward a discharge port that is different from the outlet port for connection to the user equipment.
  • In current conditions, in case of malfunction the entire flow of gas is in practice dispersed, with obvious damage both as regards the economical aspect and as regards the occurrence of potential dangers.
  • The aim of the invention is to solve the problem described above by providing a device for regulating the flow of gas toward user equipment, of the type with two regulation stages in succession, which in case of malfunction is capable of reducing significantly the amount of gas that is released, so as to achieve a considerable reduction of waste and an increase in safety.
  • Within this aim, an object of the invention is to provide a regulation device that allows to increase safety conditions considerably, without thereby having to resort to complicated apparatuses.
  • Another object of the present invention is to provide a regulation device that thanks to its particular constructive characteristics is capable of giving the greatest assurances of reliability and safety in use.
  • Another object of the present invention is to provide a device for regulating the flow of gas toward user equipment that can be obtained easily starting from commonly commercially available elements and materials and is further competitive from a merely economical standpoint.
  • This aim and these and other objects that will become better apparent hereinafter are achieved by a device for regulating the flow of gas toward user equipment, according to the invention, comprising a first regulation stage and a second regulation stage arranged downstream in a direction of flow of the gas to be controlled, characterized in that it comprises a flow limiter interposed between said first and second regulation stages and adapted to intervene if said second stage malfunctions.
  • Further characteristics and advantages will become better apparent from the description of a preferred but not exclusive embodiment of a device for regulating the flow of gas toward user equipment, illustrated only by way of non-limitative example in the accompanying drawings, wherein:
  • Figure 1 is a schematic view of the regulation device according to the invention;
  • Figure 2 is a sectional view of the flow limiter;
  • Figure 3 is a sectional view of the second regulation stage in normal operating conditions;
  • Figure 4 is a view of the second regulation stage in failure conditions.
  • With reference to the figures, the device for regulating the flow of gas toward user equipment, generally designated by the reference numeral 1, comprises a first regulation stage 2, which is arranged externally, and a second regulation stage, designated by the reference numeral 3.
  • In the specific illustrated example, the first and second regulation stages are directly connected one another and arranged side by side; nothing changes conceptually if the first and second stages are physically spaced and connected by a connecting duct.
  • The particularity of the invention consists in that there is provided a flow limiter, generally designated by, the reference numeral 10, which is interposed between the first stage 2 and the second stage 3 and is designed to act when a malfunction occurs in the second stage.
  • According to a preferred but not exclusive embodiment, the limiter 10 which is arranged at an outer casing 31 of the second stage, has a cylindrical bushing 11, which is accommodated hermetically in a seat 12 and forms an internal channel 13.
  • At the end of the bushing 11 that is directed toward the first stage there is a ball-type limiter 15, which is accommodated slidingly between radial spacer fins 16 and is pushed by a contrast spring 17.
  • If a malfunction occurs in the second stage and accordingly the pressure rises abnormally, the ball overcomes the elastic contrast applied by the spring 17 and arranges itself in abutment against a frustum-shaped flared portion 19 formed at the axial end of the bushing.
  • The second stage 3 is provided internally with a conventional membrane 30, which is connected to the casing 31 and engages centrally a stem 32 that is affected by conventional setting springs 33.
  • If a malfunction occurs, for example if an arm 40 that supports a gasket 41 that acts on a port 42 for connection to the first stage breaks, the occurrence of an overpressure moves the membrane upward, causing a consequent flow of gas toward a discharge valve 45.
  • In these conditions, the excessive flow of gas causes the intervention of the limiter with the ball which, by engaging the frustum-shaped flared portion 19, limits significantly the flow of gas and accordingly limits the quantity of gas evacuated externally.
  • It should be added to the above that the pressure in the second stage, even in case of malfunction, is kept below 140 millibars.
  • From the above description it is evident that the invention achieves the intended aim and objects, and in particular the fact is stressed that a regulation device is provided in which the presence of a limiter interposed between the first stage and the second stage allows to reduce significantly the quantity of gas that is sent toward the discharge in case of malfunction of a component of the second stage.
  • The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.
  • All the details may further be replaced with other technically equivalent elements.
  • In practice, the materials used, as well as the contingent shapes and dimensions, may be any according to requirements.
  • The disclosures in Italian Patent Application No. MI2002A001879 from which this application claims priority are incorporated herein by reference.
  • Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims (7)

  1. A device (1) for regulating a flow of gas toward user equipment, comprising a first regulation stage (2) and a second regulation stage (3) arranged downstream in a direction of flow of the gas to be controlled, characterized in that it comprises a flow limiter (10) interposed between said first (2) and second (3) regulation stages and adapted to intervene if said second stage (3) malfunctions.
  2. The device according to claim 1, characterized in that said flow limiter (10) is arranged at an outer casing (31) of said second regulation stage (3).
  3. The device according to claim 1, characterized in that said flow limiter (10) is arranged on a duct for connection between said first regulation stage (2) and said second regulation stage (3).
  4. The device according to one or more of the preceding claims, characterized in that said flow limiter (10) comprises a cylindrical bushing (11) that is accommodated hermetically in a seat (12) and forms an internal channel (13), a ball-type limiter (15) being arranged at the end of said bushing (11) that is directed toward the first stage (2) and being slidingly accommodated between radial spacer (16) fins and pushed by a contrast spring (17).
  5. The device according to one or more of the preceding claims, characterized in that said bushing (11) has a frustum-shaped flared portion at the end where said ball-type limiter is provided.
  6. The device according to one or more of the preceding claims, characterized in that said second stage (3) has a valve (45) for discharging the flow of gas in case of malfunction.
  7. The device according to one or more of the preceding claims, characterized in that the pressure of the gas at the outlet of said second regulation stage (3) is lower than 140 millibars.
EP20030003148 2002-09-03 2003-02-18 Gas flow regulator with a flow limiter Expired - Lifetime EP1396774B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20021879 2002-09-03
ITMI20021879 ITMI20021879A1 (en) 2002-09-03 2002-09-03 GAS FLOW REGULATION DEVICE TOWARDS USE.

Publications (2)

Publication Number Publication Date
EP1396774A1 true EP1396774A1 (en) 2004-03-10
EP1396774B1 EP1396774B1 (en) 2006-07-12

Family

ID=31503944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030003148 Expired - Lifetime EP1396774B1 (en) 2002-09-03 2003-02-18 Gas flow regulator with a flow limiter

Country Status (7)

Country Link
US (1) US6948519B2 (en)
EP (1) EP1396774B1 (en)
CN (1) CN100356282C (en)
AT (1) ATE333119T1 (en)
AU (1) AU2003200517B2 (en)
DE (1) DE60306727D1 (en)
IT (1) ITMI20021879A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2406155A (en) * 2003-08-28 2005-03-23 Aesseal Plc Excessive flow cut off valve with pressure regulator
EP2491285A4 (en) * 2009-10-19 2016-12-28 Luis Guillermo Ramirez-Diaz Automatic Fluid Spill Prevention and Shutt Off Safety Valve
IT202000005749A1 (en) * 2020-03-18 2021-09-18 Omb Saleri S P A VALVE FOR FUEL CELL SELF-TRACTION SYSTEMS WITH SECONDARY SAFETY DEVICE

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8087428B1 (en) * 2006-12-07 2012-01-03 Beswick Engineering Co., Inc. High pressure inlet regulator
US8256446B2 (en) * 2007-04-23 2012-09-04 Emerson Process Management Regulator Technologies, Inc. Modular regulator platform
US9709998B2 (en) 2013-03-14 2017-07-18 Marshall Excelsior Co. Pressure regulator
AU2014291642B2 (en) * 2013-07-19 2017-12-21 African Oxygen Limited Gas pressure regulator
US9664384B2 (en) * 2014-04-10 2017-05-30 Linde Aktiengesellschaft Valve arrangement
GB201711670D0 (en) * 2017-07-20 2017-09-06 Qinov8 Uk Safety valve
US11231119B2 (en) * 2018-03-28 2022-01-25 Allison Transmission, Inc. Clutch apply cavity air bleed
US10823206B2 (en) * 2018-07-31 2020-11-03 Emerson Process Management Regulator Technologies, Inc. Vent limiting device for use with fluid regulators
PT115890B (en) * 2019-11-04 2021-10-27 Univ De Coimbra PRESSURE STABILIZER
IT202000017599A1 (en) * 2020-07-20 2022-01-20 Caleffi Spa DIAPHRAGM PRESSURE REDUCER
US11852255B2 (en) 2021-03-03 2023-12-26 Lincoln Global, Inc. Combination regulator for cryogenic tanks
US20230064155A1 (en) * 2021-08-24 2023-03-02 Te Feng LIN Gas regulator with overload protection function

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB358260A (en) * 1930-09-24 1931-10-08 Paul Gilgenberg Device for withdrawing low pressure gases from high pressure vessels
US5456281A (en) * 1994-08-15 1995-10-10 Teay; Jaw-Shiunn Gas regulator with double stabilizing function
EP0994291A2 (en) * 1998-10-12 2000-04-19 Angela Pagani Two-stage pressure regulator with dual safety system, particularly for liquefied-gas cylinders
FR2811399A1 (en) * 2000-07-04 2002-01-11 Briffault Sa Pressure reducer for gas has sprung membrane in housing forming chambers with inlet valve

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US2867234A (en) * 1951-02-14 1959-01-06 Bastian Blessing Co Pressure regulator safety valve
US4105044A (en) * 1976-11-15 1978-08-08 Ward Aero, Inc. Flow check valve with bias spring removal capability
US5203371A (en) * 1992-11-05 1993-04-20 Teay Jaw Shiunn Gas regulator with several stage adjustment
CN1111293C (en) * 1997-08-08 2003-06-11 庄辉楠 Timing control mechanism large flowrate and non-pressure-drop device for coal gas explosion protector
GB9805638D0 (en) 1998-03-18 1998-05-13 Bioshield Uk Limited Antimicrobial shield
CN2368062Y (en) * 1999-03-11 2000-03-08 柳州第二空气压缩机总厂 Regulation valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB358260A (en) * 1930-09-24 1931-10-08 Paul Gilgenberg Device for withdrawing low pressure gases from high pressure vessels
US5456281A (en) * 1994-08-15 1995-10-10 Teay; Jaw-Shiunn Gas regulator with double stabilizing function
EP0994291A2 (en) * 1998-10-12 2000-04-19 Angela Pagani Two-stage pressure regulator with dual safety system, particularly for liquefied-gas cylinders
FR2811399A1 (en) * 2000-07-04 2002-01-11 Briffault Sa Pressure reducer for gas has sprung membrane in housing forming chambers with inlet valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2406155A (en) * 2003-08-28 2005-03-23 Aesseal Plc Excessive flow cut off valve with pressure regulator
US7219688B2 (en) 2003-08-28 2007-05-22 Aes Engineering Limited Fluid control valve
GB2406155B (en) * 2003-08-28 2007-06-27 Aesseal Plc Fluid control valve
EP2491285A4 (en) * 2009-10-19 2016-12-28 Luis Guillermo Ramirez-Diaz Automatic Fluid Spill Prevention and Shutt Off Safety Valve
IT202000005749A1 (en) * 2020-03-18 2021-09-18 Omb Saleri S P A VALVE FOR FUEL CELL SELF-TRACTION SYSTEMS WITH SECONDARY SAFETY DEVICE
WO2021186303A1 (en) * 2020-03-18 2021-09-23 Omb Saleri S.P.A. A valve for fuel cell vehicle systems with a secondary safety device

Also Published As

Publication number Publication date
AU2003200517B2 (en) 2007-09-13
CN1480813A (en) 2004-03-10
ATE333119T1 (en) 2006-08-15
CN100356282C (en) 2007-12-19
US20040040600A1 (en) 2004-03-04
DE60306727D1 (en) 2006-08-24
ITMI20021879A1 (en) 2004-03-04
US6948519B2 (en) 2005-09-27
EP1396774B1 (en) 2006-07-12
AU2003200517A1 (en) 2004-03-18

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